One of Our Dinosaurs Is Missing

A 1975 film set in London in the 1920s. Lord Southmere steals the "Lotus X" formula from China on microfilm, then hides it in a dinosaur skeleton in the Natural History Museum. He then loses his memory, and can't remember exactly where he hid it, so a group of nannies try to find it before the Chinese can reclaim it.

This is one of the horde of live action adventure/comedy films that Disney was apt to make in the sixties and seventies (Others include Race to Witch Mountain, Condorman, Follow Me Boys, and a whole slew of films starring a young Kurt Russell.)

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Tropes used in One of Our Dinosaurs Is Missing include:

• Easy Amnesia Lord Southmere keeps getting clonked on the head by bricks, causing him to lose/regain his memory.
• Mistaken for Spies Lord Southmere keeps insisting that he's not a spy, just an ordinary businessman. However, nobody else believes him; as his (former) nanny points out, he would say that if he was a spy.
• Not My Driver Lord Southmere is kidnapped by the Chinese.
• Parasol of Pain Lord Southmere's umbrella is apparently a gun in disguise, although we only see him threaten someone, and not actually fire it.